high-strength and ultra-high- strength thermomechanically rolled fine-grained … · 2019-12-21 ·...

voestalpine Grobblech GmbH

www.voestalpine.com/grobblech

High-strength and ultra-high-strength thermomechanicallyrolled fine-grained steelsTechnical terms of delivery for heavy plates

2 Technical terms of delivery for heavy plates alform® high-strength February 2017

Subject to change pursuant to further development.The current version is available at www.voestalpine.com/grobblech

High-strength and ultra-high- strength thermomechanically

rolled fine-grained steels

alform®

Steel grades

High-strength: alform plate 620 M alform plate 700 M Ultra-high-strength: alform plate 900 M x-treme alform plate 960 M x-treme

alform plate 1100 M x-treme

More information you will find in our technical terms of delive-ry for thermomechanically rolled steels.


The high-strength steel grades alform plate 620 M, alform plate 700 M and the ultra-high-strength steel

grades alform plate 900 M x-treme, alform plate 960 M x-treme and alform plate 1100 M x-treme are thermo-

mechanically rolled fine-grain structural steels with excellent weldability and good bending properties.

alform® steels are produced via the LD-route and are fully killed.

Production process

Table 1:Steel grades

Steel grades

Steel grades

Steel grades

alform plate 620 M

alform plate 700 M




The alloying concept provides very low carbon contents and lowcarbon equivalents, which aims in very good weldability. The highstrength provide special advantages in areas, where weight savings are of great importance, e.g. for mobile cranes, concrete pump cars, steel construction industry and architecture, penstocks and vehicles.

The technical terms of delivery apply for plate thickness from 8 - 50 mm for alform plate 620 M 8 - 60 mm for alform plate 700 M 8 - 30 mm for alform plate 900 M x-treme 8 - 30 mm for alform plate 960 M x-treme 8 - 25 mm for alform plate 1100 M x-treme

alform® x-treme


Carbon equivalent

Standard values for carbon content and carbon equivalent

Plate thickness C CEV1) CET2) PCM3)

Steel grades mm % % % %

alform plate 620 M

15 0.06 0.51 0.30 0.21

40 0.06 0.52 0.31 0.21

alform plate 700 M 15 0.04 0.43 0.26 0.18

40 0.06 0.47 0.26 0.19


12 0.08 0.56 0.31 0.24

20 0.08 0.60 0.33 0.25


12 0.08 0.56 0.31 0.24

20 0.08 0.60 0.33 0.25

alform plate 1100 M x-treme 20 0.13 0.70 0.40 0.31

1) CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15, according to IIW2) CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40, according to SEW 0883) PCM = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5*B, according to API 5L

Table 3:Carbon

content andequivalent

Chemical composition

Table 2:Chemical

composition

As-delivered condition

Plates of alform plate 620 M and alform plate 700 M are delivered in a thermomechanical rolled condition with accelerated cooling. Exceptionally conventional quenching and tempering is permitted. Plates of alform plate 900 M x-treme, alform plate 960 M x-treme and alform plate 1100 M x-treme are delivered in a thermomechanically rolled condition with accelerated cooling and tempering.

Heat analysis

Guaranteed values

mass in %

C Si Mn P S Altot. Cr Mo Ni V1) Nb1) Ti1) B

Steel grades max. max. max. max. max. min. max. max. max. max. max. max. max.

alform plate 620 M 0.12 0.50 2.00 0.020 0.008 0.020 1.50 0.50 2.00 0.12 0.06 0.05 0.0050

alform plate 700 M 0.12 0.60 2.10 0.020 0.008 0.020 1.50 0.50 2.00 0.12 0.06 0.05 0.0050

alform plate 900 M x-treme 0.12 0.60 1.70 0.020 0.008 0.020 1.50 0.70 2.00 0.12 0.06 0.05 0.0050



1) The total of Nb, V und Ti must not exceed 0.22%.

The chemical composition of alform plate 620 M is according to EN 10025-6 for steel grade S620QL.The chemical composition of

alform plate 700 M is according to EN 10149-2 for steel grade S700MC. The chemical composition of alform plate 900 M x-treme is

according to EN 10025-6 for steel grade S890QL. The chemical composition of alform plate 960 M x-treme is according to EN 10025-6

for steel grade S960QL.


Table 4:Mechanical

properties

Test unit

Unless otherwise agreed upon ordering, 40 t of a heat or a smaller portion is used as test unit for the mechanical properties. The test unit must consist of plates with the same steel grade and the same thick ness range for the yield strength according to table 4.

Scope of testing

Quality testing includes the tensile test. The notch impact bending test is carried out on longitudinal samples at –40 °C. A different sample position or testing temperature must be agreed on request. The heat analysis is provided as proof of the chemical composition.

Unless otherwise agreed, tolerances pursuant to EN 10029 (thickness tolerance according to class A, flatness tolerance according to class N), and surface finish according to EN 10163-A1 are valid.

Quality test

Tolerances and surface finish

Mechanical properties

Mechanical properties in as-delivered condition

Plate thickness Yield strength Tensile strength1) Fracture elongation1) Notch impact

range YS min. Rm L0 = 5,65 √ S0 energy2), min.

Steel grades mm MPa MPa min., % J

alform plate 620 M 8 < 50 620 700 - 890 15 40

8 < 15 700 770 - 1,050 10 40

alform plate 700 M > 15 < 50 680 770 - 1,050 12 40

> 50 < 60 650 770 - 1,050 12 30

alform plate 900 M x-treme 8 < 30 900 940 - 1,100 11 30

alform plate 960 M x-treme 8 < 30 960 980 - 1,150 10 30

alform plate 1100 M x-treme 8 < 20 1,100 1,120 - 1,300 8 30

> 20 < 25 1,080 1,100 - 1,300 8 30

1) Tensile test in accordance with EN 10002 on transverse samples. 2) Notch impact bending test in accordance with EN 10045 on Charpy-V longitudinal samples at –40 °C.

The mean value from 3 individual samples must reach the specified requirements. No individual value may be below 70% of the

guar anteed mean value. For thicknesses < 10 mm, samples similar to Charpy-V with dimensions of 10 x 7.5 mm or 10 x 5 mm

are tested. The guaran teed value is reduced in proportion to the sample cross-section.

The mechanical properties of alform plate 620 M are according to EN 10025-6 for steel grade S620QL. The mechanical properties of

alform plate 900 M x-treme are according to EN 10025-6 for steel grade S890QL. The mechanical properties of alform plate 960 M

x-treme are according to EN 10025-6 for steel grade S960QL.


Type of certificate accordig to EN 10204 must be agreed upon ordering.

Material testing certificate

In general, marking consists of: voestalpine symbol Steel grade designation Heat number Plate number

Marking

Processing guidelines

Table 5:Recommended

edging radii

Cold forming

alform® steels provide good cold forming properties. On condition that cut edges have been ground very smooth and that the bending process is done skillfully 90°-bending without cracks is guaranteed for die-radii according to table 5.

Recommended edging radii Edging radii

Ri min. at 90° edging

(s = plate thickness)

Position of the bending edge

to the rolling direction

Steel grades Longitudinal Transverse

alform plate 620 M 4 s 3 s

alform plate 700 M 4 s 3 s

alform plate 900 M x-treme 5 s 4 s



Hot forming and heat treatment

alform® steels are in thermomechanically rolled condition and are intended for cold forming. Hot forming and stress relief annealing are possible up to 580 °C. For opti-mum toughness properties of the weld we recommend stress relief annealing up to max. 520 °C. Tensile strength of alform plate 620 M and alform plate 700 M will de-crease within the guaranteed values in table 4 compared to delivery condition due to heat input. Normalizing and quenching and tempering deteriorate the microstructure of TMCP-steels and therefore are not to be processed.


Welding

General information alform® steels have excellent weld ability, which results of a low carbon equivalent (CEV), and in particular, a low carbon content (C). The low CEV and C values provide reduced hardening in the heat-affected zone (HAZ) of welds. This leads to greater resistance to cold cracking (picture 1).

Picture 1: Hardening

in HAZ400

380

360

340

320

300

280

260

0.5 1.21.11.00.80.70.6 0.9 1.3 1.4

Arc energy [kJ/mm]

Max

. har

dne

ss in

HA

Z [H

V10

]

alform plate 960 M x-treme alform plate 700 M

Hardening in heat-affected zone (HAZ)

However, despite this advantage, in view of the high yield point of the steel grade, it is advisable to take extra care during welding. The generally valid and accepted rules for the welding of low-alloyed, higher-strength fine-grain structural steels according to EN 1011-2 and STAHL-EISEN Werkstoffblatt (SEW) 088 must be observed.

Weld preparation, thermal cuttingWeld preparation can take the form by machining or thermal cutting. In the case of the latter, preheating is not required for plate thickness up to 20 mm at a workpiece temperature above +5 °C. Prior to welding the weld edges must be dry and clean.

Welding processAll standard automatic and manual welding processes can be employed. Inert gas shielded welding (GMAW, IGSW) with solid wire has the advantage of providing very low hydrogen content in the weld material and is also especially suitable with regard to cold cracking resistance.

Filler materials and welding conditions (preheating, welding parameters)The selection of the filler materials should result in a weld that matches the chemical composition and the mechanical-technological properties of the base material.

heat-affected zone (HAZ)


Interpass- t8/5- Preheating temperature sector Material Process Filler metal Shielding gas [°C] 1) 2) [°C] 3) [s] 4)

Böhler alform 700-IG ER 110 S-G wires (acc. to AWS A 5.28)

e.g. Böhler X70-IG, Union X85 ER 110 S-G wires (acc. to AWS A 5.28)

Böhler alform 700-UP Böhler alform BB 700 F10 A 4-EM4(mod.)-M4 (acc. to AWS 5.23) F69 A 4-EM4(mod.)-M4 (nach AWS 5.23)

e.g. Union S3 NiMoCr + UV 421 TT F11A8-EG-F6 (acc. to AWS A 5.23)

BÖHLER FOX alform 700, … E 11018-GH4R electrodes (acc. to AWS A 5.5)

e.g. Phönix SHNi2K 100 … E 11018-G electrodes (acc. to AWS A 5.5)

e.g. Böhler NiCrMo2.5iG ... ER 110S-G (acc. to AWS A5.28)

BÖHLER alform 960-IG ER 120 S-G wires (acc. to AWS A 5.28) e.g. Union X96, Union X90-IG, …

ER 120 S-G wires (acc. to AWS A 5.28)

e.g. Böhler FOX EV 100, … E 12018-G electrodes (acc. to AWS A 5.5)

e.g. Phönix SHNi2K 130 … E 12018-G electrodes (acc. to AWS A 5.5)

BÖHLER alform 1100-IG no standardized filler materials available

1) Preheating up to 60°C is recommended for drying fusing edge2) In complex welded construction (e.g. out of position welding, accumulation of welds, …) preheating according EN 1011-2

is recommended3) For specific requirements on strength and toughness of filler material and weld an interpass temperature below 150°C is recommended 4) Cooling time t8/5 (s), measured by thermocouple submerged into molten bath

Table 6:Recommen-ded welding

consumables

alform plate 620 Malform plate 700 M

alform plate 900 M x-tremealform plate 960 M x-treme

GMAW

SAW

SMAW

GTAW

GMAW

SMAW

M21(e.g. Corgon 18)

M21(e.g. Corgon 18)

---

---

60 - 150

60 - 150 ≤ 150

≤ 150 3 - 12

Base material Welding process – consumable

3 - 15

---

For welding alform plate 700 M ER 110 S-G wires according to AWS A 5.28 are proven for inert gas shielded welding. Type E11018-G basic-coated stick electrodes according to AWS A 5.5 are suitable for shielded metal arc welding, and the wire-powder combi nation ~ F 10 A4-EM2-M2 according to AWS A 5.23-97 is suitable for submerged arc welding. Recommended welding consumables for high-strength and ultra-high-strength alform® steels are provided in table 6 and by alform® welding system at www.voestalpine.com/heavyplates/en/Brand-names/alform-R-welding-system.alform® welding system is the world’s first custom-matched system of steels and consumables for high-strength and ultra-high-strength welded structures.

alform plate 1100 M x-treme GMAWM21

(e.g. Corgon 18)60 - 150 ≤ 150 3 - 12


You will find more information at www.voestalpine.com/welding Experienced welding engineers are at your disposal.

As a result of their high strength, such welded joints show a higher tendency to cold cracking, which can be minimised by the selection of suitable welding conditions.The tendency to crack formation in the HAZ, in general, is distinctly lower than in the weld metal due wire. Basic electrodes and welding powder for submerged arc welding must be subjected to secondary drying. The instructions of the manufacturer concer-ning drying and the method of use to obtain the required hydrogen criterion must be adhered to.The risk of cold cracking can be minimised by moderate preheating in accordance with picture 2, even in case of unfavourable combinations between heat input and plate thickness.

Picture 2:Recommended

preheatingtemperature

0 10 20 30

200

180

160

140

120

100

80

60

40

20

0

40 50 60

Plate thickness [mm]

Min

imum

pre

heat

ing

tem

pera

ture

[°C

]

SAW (7 ml/100 g WM)

GMAW (3 ml/100 g WM)

Recommended preheating temperaturealform plate 620 M, alform plate 700 M, alform plate 900 M x-treme and alform plate 960 M x-treme

To ensure the high strength and impact properties of the weld (base material, HAZ and filler metal) cooling times t8/5 of 3 - 15 seconds and interpass temperatures of < 150 °C are desirable. Cooling times t8/5 above 15 seconds are permitted under special conditions (e.g. overmatching, ...) but are to be proven by the welder in every case.

Precondition for high notch impact energy in the welded joint is multi-layer welding, in which the number of weld layers is calculated on the basis of the following approximation:

Following appropriate checking (e.g. using process tests according to EN 15614-1), other welding conditions can be selected, if the properties of the welded joint correspond with the requirements made on the component.

Minimum number Plate thickness (mm) of weld layers ˜ 3


Dimensions

alform plate 620 M

Maximum width: max. width of 3,750 mm for weight per piece > 15 mt

Maximum length: 18,700 mm

Different dimensions on request.

alform plate 620 M

Thickness

(mm)

60

55

50

45

40

35

30

25

20

15

10

8

1.50

0

1.60

0

1.70

0

1.80

0

1.90

0

2.00

0

2.10

0

2.20

0

2.30

0

2.40

0

2.50

0

2.60

0

2.70

0

2.80

0

2.90

0

3.00

0

Wid

th

(mm

)

3.10

0

3.20

0

3.30

0

3.40

0

3.50

0

3.60

0

3.70

0

3.80

0


Dimensions

alform plate 700 M

Maximum width: max. width of 3,750 mm for weight per piece > 15 mt



Thickness

(mm)

60

55

50

45

40

35

30

25

20

15

10

8

1.50

0

1.60

0

1.70

0

1.80

0

1.90

0

2.00

0

2.10

0

2.20

0

2.30

0

2.40

0

2.50

0

2.60

0

2.70

0

2.80

0

2.90

0

3.00

0

Wid

th

(mm

)

3.10

0

3.20

0

3.30

0

3.40

0

3.50

0

3.60

0

3.70

0

3.80

0


Dimensions




Thickness

(mm)

30

25

20

15

10

1.50

0

1.60

0

1.70

0

1.80

0

1.90

0

2.00

0

2.10

0

2.20

0

2.30

0

2.40

0

2.50

0

Wid

th

(mm

)

8


Dimensions




Thickness

(mm)

25

30

20

15

10

8

1.50

0

1.60

0

1.70

0

1.80

0

1.90

0

2.00

0

2.10

0

2.20

0

2.30

0

2.40

0

2.50

0

Wid

th

(mm

)


Information and product properties provided in this publication have the sole purpose of giving non-binding technical guidance and by no means replace individual expert advice from our sales and customer service team. Information and product properties provided in this brochure shall not be deemed guaranteed characte-ristics unless this has been agreed upon individually. Technical changes reserved, errors and misprints excepted. No part of this publication may be reprinted without explicit written permission by voestalpine Grobblech GmbH.

Dimensions




Thickness

(mm)

25

20

15

14

12

10

8

1.50

0

1.60

0

1.70

0

1.80

0

1.90

0

2.00

0

2.10

0

2.20

0

2.30

0

2.40

0

2.50

0

Wid

th

(mm

)

voestalpine Grobblech GmbHvoestalpine-Straße 34020 Linz, AustriaT. +43/50304/15-9440F. +43/50304/[email protected]/grobblech

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high-strength and ultra-high- strength thermomechanically rolled fine-grained … · 2019-12-21 ·...

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